| Aspen Valley Wildlife Sanctuary | Seguin |
| Auburn Horticultural Society, Auburn Memorial Hall | Central Huron |
| Ausable Bayfield Conservation Authority, Exeter | South Huron |
| Barrie Bassmasters | Barrie |
| Barrie District Hunters and Anglers Conservation Club | Springwater |
| Barrie. Municipal Office, Barrie - 165 Ferndale Dr N, Greenhouse | Barrie |
| Barrie. Municipal Office, Barrie - 20 Royal Parkside Dr, Water Operations Branch | Barrie |
| Barrie. Municipal Office, Barrie - 272 Ferndale Dr N, Landfill | Barrie |
| Barrie. Municipal Office, Barrie - 272 Ferndale Dr N, Waste Disposal Services | Barrie |
| Barrie. Municipal Office, Barrie - 45 Cedar Pointe Dr, Enforcement Services | Barrie |
| Bayfield Garden Club | Bluewater |
| Bear Creek Exotic Wildlife Sanctuary | Barrie |
| Bear With Us Centre for Bears | |
| Blue Mountain Watershed Trust Foundation | Collingwood |
| Bruce Grey Forest Festival | Hanover |
| Brussels & District Horticultural Society | Huron East |
| Canada. Fisheries And Oceans [Central East], Parry Sound, Canadian Coast Guard, Parry Sound | Parry Sound |
| CBEAC - Civic Beautification and Environmental Awareness Committee, No Physical Address | Stratford |
| CLEAResult Canada, Central East, Enbridge Home Winterproofing and IESO Energy Affordability Programs | Toronto |
| CLEAResult Canada, Central, Enbridge Home Winterproofing and IESO Energy Affordability Programs | Toronto |
| Couchiching Conservancy (The) | Orillia |
| Credit Valley Conservation, Island Lake Conservation Area, Island Lake Conservation Area | Orangeville |
| Ducks Unlimited Canada, Barrie | Barrie |
| Dysart et al. Municipal Office, Haliburton - Maple Ave, By-law Department and Animal Control | Haliburton |
| Friends of Presqu'ile Park | Brighton (Municipality of) |
| Friends of the Nancy Island Historic Site and Wasaga Beach Park | Wasaga Beach |
| Ganaraska Region Conservation Authority, Clean Water-Healthy Land Stewardship Program, Port Hope - County Rd 28 | Port Hope (Municipality of) |
| Ganaraska Region Conservation Authority, Ganaraska Region Conservation Authority - Administration, Port Hope - County Rd 28 | Port Hope (Municipality of) |
| Georgian Bay Mnidoo Gamii Biosphere, Georgian Bay Biosphere Reserve | Parry Sound |
| Georgian Bay Turtle Hospital | Oro-Medonte |
| Grey Bruce Children's Water Festival | Arran-Elderslie |
| Grey Bruce Public Health | Owen Sound |
| Grey Sauble Conservation Authority | Owen Sound |
| Haliburton, Kawartha, Pine Ridge District Health Unit, Port Hope, Inspections | Port Hope (Municipality of) |
| Heinbuch Wildlife Control, No Physical Address | Perth East |
| Hensall Horticultural Society, Mailing Address | Bluewater |
| Huron Perth Public Health, Clinton - London Rd, Safe Beach Water | Central Huron |
| Huron Perth Public Health, Clinton - London Rd, Safe Drinking Water | Central Huron |
| Huronia Land Conservancy | Midland |
| Kawartha Conservation | Lindsay |
| Kids for Turtles Environmental Education, Invasive Species Pulls, Orillia | Orillia |
| Maitland Valley Conservation Authority, Wroxeter | Howick |
| Maitland Valley Conservation Authority, Wroxeter, Middle Maitland Rejuvenation Committee | Howick |
| Mnjikaning Fish Fence Circle | Orillia |
| MTM Conservation Association, Tiny Marsh Nature Centre, Tiny Marsh Provincial Wildlife Area | Tiny |
| Muskoka Conservancy | Bracebridge |
| Muskoka Lakes Association | Muskoka Lakes Township |
| Muskoka Watershed Council | Bracebridge |
| Northumberland Land Trust | Cobourg |
| Ontario Nature | Toronto Downtown |
| Ontario Water Centre (The) | Georgina |
| Ontario Woodlot Association, Huron Perth Chapter | Stratford |
| Ontario. Ministry of Environment, Conservation and Parks, Aurora District Office, Holland Marsh Provincial Wildlife Management Area | Bradford West Gwillimbury |
| Ontario. Ministry of Environment, Conservation and Parks, Barrie Office | Barrie |
| Ontario. Ministry of Environment, Conservation and Parks, Bracebridge Field Office | Bracebridge |
| Ontario. Ministry of Environment, Conservation and Parks, Midhurst District Office, Midhurst (Huronia) District Office | Springwater |
| Ontario. Ministry of Environment, Conservation and Parks, Minden - Hwy 35, Minden Area Office | Minden Hills |
| Ontario. Ministry of Environment, Conservation and Parks, Owen Sound Field Office | Owen Sound |
| Ontario. Ministry of Environment, Conservation and Parks, Parry Sound District Office, Southern Region | Parry Sound |
| Ontario. Ministry of Environment, Conservation and Parks, Peterborough - Mailing Address, Natural Resources Information and Support Centre | Peterborough |
| Ontario. Ministry of Environment, Conservation and Parks, Thornbury, Niagara Escarpment Commission | Blue Mountains |
| Ontario. Ministry of Northern Development, Mines, Natural Resources and Forestry, District Office - Peterborough | Peterborough |
| Ontario. Ministry of the Environment Conservation and Parks, Owen Sound District Office, Ontario. Ministry of the Environment Conservation and Parks, Owen Sound District Office | Owen Sound |
| Ontario. Ministry of the Environment, Conservation and Parks, Peterborough District Office, Ontario. Ministry of the Environment, Conservation and Parks, Peterborough District Office | Peterborough |
| Ontario. Ministry of the Environment, Conservation and Parks, Spills Action Centre | Toronto |
| Ontario. Northern Development, Mines, Natural Resources and Forestry, Parry Sound District Office, Southern Region | Parry Sound |
| Orillia Fish and Game Conservation Club | Orillia |
| Orillia Naturalists Club | Orillia |
| Orr Lake Ratepayers Association | |
| Otonabee Region Conservation Authority, Peterborough - Milroy Dr, Otonabee Region Conservation Authority - Administration | Peterborough |
| Peterborough Household Hazardous Waste Depot | Peterborough |
| Peterborough Public Health, Peterborough - King St, Safe Water | Peterborough |
| Procyon Wildlife Rehabilitation and Education Centre, Procyon Wildlife | Beeton |
| Public Health Ontario., Peterborough Laboratory | Peterborough |
| Ramara Township, Infrastructure, Brechin - 2297 Hwy 12 | Ramara |
| General Topics and Information - Central East, Reporting Sick, Orphaned or Injured Wild Animals | |
| Saugeen Valley Conservation Authority, Saugeen Conservation | South Bruce |
| Sawyer Preservation Woodlot Association | West Perth |
| Stratford & District Horticultural Society | Stratford |
| Stratford Field Naturalists, Mailing Address | Stratford |
| Sydenham Bruce Trail Club | Owen Sound |
| Sydenham Conservation Foundation | |
| Sydenham Sportsmen's Association | Georgian Bluffs |
| Upper Avon River Conservation Club | Perth East |
| Wasaga Beach. Municipal Office | Wasaga Beach |
| Wellington-Dufferin-Guelph Public Health, Orangeville, Public Health | Orangeville |
| Wellington-Dufferin-Guelph Public Health, Shelburne, Public Health | Shelburne |
| West Perth. Municipal Office, West Perth Thames Nature Trail and Wetlands | West Perth |
| Woodlands Wildlife Sanctuary | |
| Wye Marsh Wildlife Centre | Midland |